I have site to site tunnel between Cisco 3000 VPN concentrator and PIX506. I will be moving it to new ASA5510, so the tunnel will be established between ASA and PIX. After inistial testing, I found that one box on remote network (time clock lol) is dropping connectivity while tunneling between Pix and ASA (works fine with concentrator). Is all of the traffic allowed thru the VPN tunnel built on ASA? I understand that it should be as long as the tunnel is up and running, correct? (note: the remote clock is using TCP ports 8888 and 8889 to communicate with server)
If there's no filter, again all traffic should be permitted.
You don't need to chose L2TP as the connection is pure IPsec.
If you want, you can post your configurations to check them out (you can remove the sensitive information)